handle an error from the hit endpoint

templates/page.html

@@ -17,9 +17,14 @@
 <script defer>
     const hits = document.getElementById('hitman-count');
     fetch("/hit/{{ page.slug }}").then((resp) => {
-        return resp.text();
+        if (resp.ok) {
+            return resp.text();
+        } else {
+            return "no";
+        }
     }).then((data) => {
         hits.innerHTML = data;
     });
 </script>
+
 {% endblock main_content %}